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Multi-leaf collimator control method, radiotherapy system and storage medium

A technology of a multi-leaf collimator and a control method, which is applied in the field of medical imaging, can solve the problems of damage to the multi-leaf collimator, inability to precisely control the multi-leaf collimator, easy collision, etc., so as to improve motion accuracy and ensure stability. Operation, damage prevention effect

Active Publication Date: 2019-12-10
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the movement of the multi-leaf collimator cannot be accurately controlled, and the parts of the multi-leaf collimator (such as blades, etc.) are easy to collide with each other, which may easily cause damage to the multi-leaf collimator components

Method used

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  • Multi-leaf collimator control method, radiotherapy system and storage medium
  • Multi-leaf collimator control method, radiotherapy system and storage medium
  • Multi-leaf collimator control method, radiotherapy system and storage medium

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0026] Figure 1a It is a flow chart of the method for controlling a multi-leaf collimator provided in Embodiment 1 of the present invention. This embodiment is applicable to controlling a multi-leaf collimator, especially applicable to controlling a multi-leaf collimator in a radiotherapy system. The method can be performed by a multi-leaf collimator control device, which can be implemented by hardware and / or software, and which can be integrated into a device (such as a radiotherapy system) for execution. For each pair of leaves, the The following steps control the motion trajectory of the blade and the box, such as Figure 1a As shown, it specifically includes the following steps:

[0027] Step 110, for each pair of blades, obtain the initial position of each blade and the target position of each blade.

[0028] Wherein, the multi-leaf collimator includes a box body arranged oppositely and multiple pairs of leaves arranged in parallel in the box body. Such as Figure 1b a...

Embodiment 2

[0063] figure 2It is a flow chart of a multi-leaf collimator control method provided by Embodiment 2 of the present invention. On the basis of the above embodiments, this embodiment is optional if the gap between the initial positions of the two leaves is less than or equal to The first threshold and the gap between the target positions of the two blades is greater than the second threshold, then the blades are first controlled to move so that the gap between the two blades is greater than the first threshold, and then the box is controlled to move , also includes: judging whether the blade and the box can move to the target position within a first preset time, if so, controlling the movement of the blade and the box, if not, increasing the The first preset time until the blade and the box can move to the target position within the first preset time.

[0064] Optionally, if the gap between the initial positions of the two blades is greater than the first threshold and the ga...

Embodiment 3

[0089] image 3 It is a flow chart of a multi-leaf collimator control method provided by Embodiment 3 of the present invention. This embodiment is based on the above embodiments. Optionally, the method further includes: monitoring the movement of the leaves in real time .

[0090] Optionally, monitoring the movement of the blades in real time includes: acquiring the current position of the blades in real time; calculating the gap between the two blades; controlling the box and the blade according to the gap between the two blades. movement of each blade.

[0091]Optionally, the controlling the movement of the box and the blades according to the gap between the two blades further includes: obtaining the gap and the current direction of motion of each blade pair, based on the At least one of clearance and the current direction of motion controls the speed and / or direction of movement of the blade.

[0092] Optionally, the method further includes: when the gap between a pair o...

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Abstract

The embodiment of the invention discloses a multi-leaf collimator control method, a radiotherapy system and a storage medium. The method comprises the following steps of: for each pair of leaves, obtaining the initial position and the target position of each leaf; judging whether a gap between the initial positions of two leaves is greater than a first threshold value or not, and judging whether agap between the target positions of the two leaves is greater than a second threshold value or not; and according to a judgment result, controlling a box body and each leaf to move. By use of the technical scheme of the embodiment of the invention, the components of the multi-leaf collimator prevent from being damaged, the movement accuracy of the multi-leaf collimator is improved, and the stableoperation of radiotherapy equipment is guaranteed.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of medical imaging, and in particular, to a method for controlling a multi-leaf collimator, a radiotherapy system, and a storage medium. Background technique [0002] Conformal radiation therapy is a high-precision radiation therapy. It uses computerized tomography (CT) images to reconstruct the three-dimensional tumor structure. By setting a series of different irradiation fields in different directions and adopting a conformal lead block consistent with the shape of the lesion, the distribution shape of the high-dose area is The three-dimensional direction (front-back, left-right, up-down direction) is consistent with the shape of the target area, while reducing the radiation dose to normal tissues around the lesion. [0003] In conformal radiation therapy, the multi-leaf collimator is an important component of the radiation head of medical radiation therapy equipment. The shape of ...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1045A61N5/1048
Inventor 祁二钊马波琪S·博思
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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